Add .editorconfig properties for formatting (code style)
Add .editorconfig properties for formatting (code style)

IDEA and some other editors support this format by default, see here:
http://editorconfig.org/

atlassian/commonmark-java,jiakuan/commonmark-java,chiwanpark/commonmark-java,atlassian/commonmark-java,marksutt/commonmark-java,vsch/flexmark-java,vsch/flexmark-java,jiakuan/commonmark-java,vsch/flexmark-java,jiakuan/commonmark-java,pcj/commonmark-java,vsch/commonmark-java,vsch/commonmark-java,pcj/commonmark-java,vsch/flexmark-java,commonmark/commonmark-java,commonmark/commonmark-java,marksutt/commonmark-java,atlassian/commonmark-java,pcj/commonmark-java,marksutt/commonmark-java,commonmark/commonmark-java,chiwanpark/commonmark-java,vsch/commonmark-java,chiwanpark/commonmark-java